You could post your test results here and see if some kind could can interpret them for you.
There is an endoscopy test where they take several biopsy samples to check them for villi blunting.
Gluten sensitive doesn't mean you are ok with gluten. I am just guessing but it probably means the doctors saw elevated antibody numbers on your celiac tests. They may have also found low levels of vitamins like Vit B-12, Vit D or low iron. These low Vitmain levels can be caused by malabsorption due to villi damage.
The testing is not 100% accurate. So even a endoscopy can have a false negative. The diet is a big learning experience when starting but like anything else, you can learn it after a while. You just need to keep going and do some research and learning. This board is a great place to do that.